Billion BiPAC 7404VNOX User Manual page 194

multicast packets will be forwarded to ports set according to the MLD Snooping below.
MLD Snooping: similar to IGMP snooping, listens in on the MLD conversation between hosts and
routers by processing MLD packets sent in a multicast network, and it analyzes all MLD packets
between hosts and the connected multicast routers in the network. Without MLD snooping, multicast
traffic is treated in the same manner as broadcast traffic - that is, it is forwarded to all ports. With MLD
snooping, multicast traffic of a group is only forwarded to ports that have members of that group.
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